一块长方形的菜地的面积是2000平方米，它的长50米，在它的四周围上一圈篱笆，篱笆的总长是多少米？
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直接写得数．÷3= 10÷=÷=×=÷=×= 4×= 1﹣=×60=×=×=××=÷5= 30÷=÷=×÷=
直接写出得数． 16×=×=×=÷=÷= 9÷=××=
直接写得数×5=÷= 10×=÷=×÷×= 99×+= 3﹣﹣= 1÷4×= （）÷6=÷÷1=
直接写出得数．×40== 25×==== 1﹣50%=÷==×=
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÷3= 10÷
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÷
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×
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÷
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×
= 4×
= 1﹣
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×60=
×
=
×
×
×
=
÷5= 30÷
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÷
=
×
÷
=
=
×
=
×
=
÷
=
÷
= 9÷
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×
×
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×5=
÷
= 10×
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÷
=
×
÷
×
+
= 3﹣
﹣
= 1÷4×
=
）÷6=
÷
÷1=
×40=
= 25×
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=
=
= 1﹣50%=
÷
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×
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